INDEX 



423 



Araguay, River, 295 



Argentine, 55 



Aroideae, 316 



Arrowgrass. See Aponogeton 



Arrowhead. See Sagittaria sagittifolia 



Asia, 295, 298 



Astrakhan, 303 



Auricula, polystely in, 180, 181, 182 



Australia, 295, 305 



Awlwort. See Subularia aquatica 



Azores, 295, 333 



Bacteria, 142 



Baltic, 123 



Baltimore, 253 



Bananas, 143 



Band leaves, n (Fig. 3), 12, 13 (Fig. 4), 



14 (Fig. 5), 19, 20, 22, 23, 140, 141 



(Fig. 90), etc. 

 Bar clay a, 33 



Bateson, W., on evolution, 334 

 Batrachian Ranunculi. See Ranunculus 



sect. Batrachium, Ranunculus aqua- 



tilis, etc.. 



Batrachospermum, 155 

 Bean, 249 

 Beetles, as pollinators of Lemnaceae, 



80; in utricle of Utricularia, 93 

 Begonia hydrocotylifolia, 256 

 Belgium, 303 

 Bellis perennis, 165 

 Bengal, no 

 Bermudas, 298 

 Bidens Beckii, 151, 313 

 Biological classification of hydrophytes, 



4-8, 42 



Birds and dispersal, 35, 298-302 

 Bittersweet. See Solanum dulcamara 

 "Bitter-sweet," Grew on heterophylly 



in, 155 



Black Sea, 302 



Bladderwort. See Utriculavia 

 Bladderwort, Common. See Utricularia 



vulgaris 

 Blue Nile, 192 

 Bodensee, 322 

 Boottia, 57 



Bostrychia Moritziana, 114 

 Brasenia peltata. See B. Schreberi 

 Brasenia Schreberi, 38 (Fig. 20), 205, 



272 



Brazil, 206, 207, 243, 295 

 Brent Geese, 302 

 Broads, 288 



Brocchinia cordylinoides , 109 

 Bromeliaceae, 108, 109 

 Bruch-Eicheln, 17 

 Brunfels, Otto, 27 

 Bull Nut. See Trapa natans 

 Bulliarda (Tillaea). affinities, 310; aqua- 

 tic with xerophilous ancestry, 310; 



cleistogamy, 234 

 Bulliarda (Tillaea) aquatica, 234, 310 



Burton-on-Trent, 211 



Butler, Samuel, 347 



Butomaceae, 157, 248, 513 



Butomus, 314 



Buttercup, Water. See Ranunculus 

 aquatilis, Ranunculus sect. Batra- 

 chium, etc. 



Cabomba, anatomy, 37,38; heterophylly, 

 29 (Fig. 14), 146; polystely, 37; re- 

 duced leaves, 338 



Cabomba caroliniana, 338 



Cabomboideae, 38, 309 



Caddice worms, 217 



Calcareous substratum, 286, 287 



Caldesia, heterophylly, 23; turions, 22, 

 225 (Figs. 148, 149) 



Caldesia parnassifolia, 22, 23, 224, 225 

 (Figs. 148, 149) 



California, 123 



Calla palustris, 167 (Fig. 107) 



Callitrichaceae, 134, 311, 318 



Callitriche, affinities, 311, 312; altitude, 

 290; annual and perennial forms, 215, 

 216; as coloniser, 299; chlorophyll, 

 absence in epidermis, 164; distribu- 

 tion, 306, 307; flowers, 237 (Fig. 154); 

 fruit, 242, 243; germination, 280; 

 heterophylly, 146, 147 (Fig. 94); land 

 form, 170 (Fig. in), 195; leaf 

 anatomy, 163, 169, 170 (Fig. in); 

 local races, 330; mucilage trichomes, 

 271; pollination, 236, 237; roots, air 

 spaces in, 187; root anatomy, 208, 

 209 (Fig. 138); seeds, 297; stomates, 

 166; vascular strand of axis, 175, 176 

 (Fig. 114); vegetative reproduction, 

 216; water pores, 267, 268 (Fig. 163) 



Callitriche autumnalis, 6, 134, 169, 237, 

 268 (Fig. 163), 307 



Callitriche stagnalis, 176 (Fig. 114), 208, 

 209 (Fig. 138), 271 



Callitriche verna, 6, 146, 147 (Fig. 94), 

 163, 1 66, 169, 170 (Fig. in), 187,236, 

 237 (Fig. 154), 306 



Caltha palustris, 198, 199 (Fig. 129) 



Cam, River, 150, 211, 263 



Cambridge, 150 



Cambridge Botanic Garden, 211 



"Camichi," 300 



"Cammomill," 144 



Campanulaceae, 313 . 



Canadian Waterweed. See Elodea 

 canadensis 



Canary Islands, 295 



Canna, 244 



Carbon dioxide, derived from sub- 

 stratum, 254; excess of, available for 

 hydrophytes, 254; proportion of, in 

 free and dissolved air, 253 



Cardamine, adventitious budding from 

 leaves, 216, 217 (Fig. 141); land and 

 water forms, 201, 202 (Fig. 133) 



